Rotary tubular furnace



Jan 1931- E. SCHULZE 1,787,841

ROTARY TUBULAR FURNACE Filed Q01.- 9. 1928 Patented Jan. 6, 1931 UNITED stares- ERIGH soHULzE, F MA DEBURG-HOPFENGAR EN,GE MA YjAssIenoR T0 THE FIBM FRIED. KRUZE'P GRUSONWERK AKTIEnerEsnLLsonAFT, or MAGDEBURG-BUCKAU,

GERMANY ROTARY TUBULAR FURNACE Application filed October 9, 1928,Seria1 No. 311,272, and in Germany N oveinber ll, 1927.:

rotary tubular furnaces-such as usedc. a

for metallurgical work, for burning cement and other purposesan d more especially to 5 the construction of the enclosed'chute or:

Lhingedto the bottom plate v13 of the furfunnel at the lower endof said furnaces through which the material under treatment passes on being dischargedand carried off. a, v i 1 i The object of the invention is toprovide an improved funnel for the purpose set forth which can be easily cleared from molten cmaterial slags and other incrustations deposited on the walls of the funnel 15 clogging the latter and interfering with the proper discharge of the material under treatment. v 1

Another object of the invention is to design funnels of the'vkind under consider'a tion the interior of which and of the furnace properis readily accessible at a moments notice, whenever required for inspection,. cleaning or other purposes.

Thesalient features of my invention are briefly outlined in the appended claims and,

its nature will be more fully understood from the following specification and the accompanying drawing in which Fig. 1 is a vertical cross section taken transverselythroughthe lower end, the a furnace and the discharge funnel;

Fig. 2 is a' verticaljcross section taken longitudinally on line A-B in Flg. 1'

through the lower furnace end and the funnel. c

The material under treatment on having been heated in the rotary furnace 2 passes through the head or hood 1 of the furnace and drops into the funnel 3 for being dls- 4o charged and carried off e. g. in small trucks According to this invention the walls of the funnel are designed so as to be removable by being swung aside orby being carried off respectively in orderto make readily accessible the interior of the funnel and of the furnace proper. 1

In the funnel shown 1n the drawing by way of an example the front wall 5 is provided with "a flap 6, hinged thereto and being adapted to be swung around, as indicated in dotted lines, thusenabling the operator tocontrol the discharge "of the material into-the'trucks 12'. i l I r v The side walls4, 4 Of"th6 funnel are PATENT oFF1 cE:i-} i n-ace head 1 'and-are'capable of being moved into any desired position by-means of; levers 14; lockmgdevices'(not shown) beingpre-ferably-provided for retaining said flaps-in their respective places.

- Accordingto thsinvention the inclined the latter preferably running on rails 17. By wheeling the bottom plate 8 off the funnel 3 the other walls of the latter become accessible for cleaning, and even the interior of the furnace head 1 is accessible for inspection, clean ing repairing and other purposes.

Various modlficatio-ns may be made in the design and structural details of funnels for rear wall or bottom plate 8 of the funnel over which the material travels on being disrotar furnaces as described above without 7 substantially departing from the spirit and the salient-ideas ofmyinvention.

For example, cooling appliances may be of the latter: In the funnel, shown by way of an example numeral 9 in Fig. 2 indicates a flexible pipe or hose by means of which water or another cooling medlum 1s supplled to a systemofcooling coils 18, mounted at thebeing arranged underneath said pipes 10 and extendlng parallelcto the rails 17.

stead of a'fi'exible pipe pair of extensible trombone pipes may be provided for supplying the cooling liquid and rendering removable the'bottom plate 8 in the manner described hereinbefore. c

' That-I- claim is:'

1. Apparatus for controlling the discharge so. provided for cooling the walls of t ne tunnel '3 so asJto arevent destructive overheatin ofmaterialin bulk from rotary tubular'furnaces, Which: comprises a funnel of rectangular cross sect-ion attached to the off-take structure of the furnace and havinginovable Walls, the front Welland the adjacent lateral Walls being supported on hinges, so asto be capable of being swung around'an'd thus Widening or narrowing the passage for the material to be discharged, means being provided for controlling the angular position of the said lateral. Walls relatively to each other, the in dined renr Well of the funnel being supported by a carrier adapted to bodily Withdraw the ]f211"\ \'2t11f 10111 the funnel. w 2. Apparatus for the p'urpose audhaving theieaturos outlined in claim 1, lllfivhlCh lovers are pivotaiiy attached to the lateral Walls of the tunnel, for manipulating said Walls and locking them in their adjusted posi- 131011. 7 V i I r Y L 3. 'Apperatusior the purpose and lmving the features-outlined in claim 1', in which means are providedfor cooling the rear Wall of the funnel so as ,to prevent destructive overheating of the latt-eiysa-id means oompris ing cooling tubes Which are connected with a source of cooling liquid and are adapted to disohergethe latter intoen open' gutter arranged along the path of the Carrier suppor-t- 3O ingthe rear Willi'Of the furnace. I

In testimony whereof I have sig ed my name to this specification.

ERIGH SCHULZE- 

